diff --git a/src/engines/hermes/pages/chat.js b/src/engines/hermes/pages/chat.js
index b831e8d..5544b16 100644
--- a/src/engines/hermes/pages/chat.js
+++ b/src/engines/hermes/pages/chat.js
@@ -13,7 +13,8 @@
  *
  * State lives in `chat-store.js`; this module only does DOM + events.
  */
-import { t } from '../../../lib/i18n.js'
+import * as tts from '../../../lib/tts.js'
+import { humanizeError } from '../../../lib/humanize-error.js'
 import { api, invalidate } from '../../../lib/tauri-api.js'
 import { toast } from '../../../components/toast.js'
 import { showConfirm } from '../../../components/modal.js'
@@ -1008,7 +1009,7 @@ export function render() {
           await store.switchProfile(name)
           toast(t('engine.chatProfileSwitched').replace('{name}', name), 'success')
         } catch (err) {
-          toast((err?.message || String(err)), 'error')
+          toast(humanizeError(err, t('engine.chatProfileSwitchFailed') || 'Profile switch failed'), 'error')
         }
       })
     })
diff --git a/src/locales/modules/engine.js b/src/locales/modules/engine.js
index c721066..1bce34e 100644
--- a/src/locales/modules/engine.js
+++ b/src/locales/modules/engine.js
@@ -557,6 +557,8 @@ export default {
   hermesOAuthDeviceTimeout: _('登录超时（10 分钟未完成）', 'Login timed out (10 min)', '登入逾時（10 分鐘未完成）'),
   hermesOAuthDeviceFailed: _('授权失败', 'Authorization failed', '授權失敗'),
   hermesOAuthDisconnectFailed: _('断开失败', 'Disconnect failed', '中斷失敗'),
+  // Hermes UX 小白化：chat profile 切换错误
+  chatProfileSwitchFailed: _('切换 Profile 失败', 'Switch profile failed', '切換 Profile 失敗'),
   // Web 模式（远程浏览器）下流式聊天暂不可用
   chatWebModeStreamingUnsupported: _(
     'Web 模式暂不支持 Hermes 实时流式聊天（依赖桌面端事件桥）。请打开桌面客户端使用此功能。',